Automatically-threading shuttle for looms



Patented Nov. 17, 1925.

UNITED STATES 1,561,980 PATENT OFFICE. i'

ARTHUR S. JOHNSON, 0F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO IDRAPER CR- PORATION, OF HOIPEDALE, MASSACHUSETTS, A CORPORATION vOF MAINE.

AUTOMATICALLY-THREADING SHUTTLE FOR LOOMS.

Applicationfled August 8, 1925-. Serial No. 49,047.

To aZZ lwiwm it may cio/noem:

Be it known that I, ARTHUR SL JOHNSON,

a citizen of the United States, and a resident of Hopedale, in the county of Worcester and State of Massachusetts, have invented an Improvement Threading Shuttles for Looms, of which the following description, in connection with the accompanying drawings, is a Specification, like characters on the drawings representing like parts.

This invention relates to automatically threading shuttles for looms, and more parf ticularly to means for preventing unthreading of the shuttle after it has been threaded. It is now the common practice to provide automatically threading shuttles withoverhangs, guards and other devices to prevent the thread from escapingv from the shuttle after once the shuttle has been threaded. The formation of Such overhangs, guards and the like, has added considerable to the cost of threading blocks, and.V notwithstanding, the general purpose ofv such guards andy overhangs, their object has often failed vtol bev accomplished'in actual weaving.

- The object of the present invention is to provide l an' automatically threading shuttle with'means which will permit the shuttle to be automaticallyv threaded while in the loom and thereafter lock the thread in its shuttle threaded position. In accordance with the present invention, the shuttle is provided with avyieldingly mounted lock which normally closes the passageway through which the thread passes to effect the threading operation, but which yields to the action of the y thread during loom threading to permit the f thread to pass and thereafter prevent it from unthreading or passing in the opposite di# rection.

The invention and y new combination of artswill best be made clear from the folowing description and thev accompanying drawings of one good form thereof.

In the drawings:

Fig. 1 is a perspective view of an automatically threading shuttle provided with the present-invention;

Fig. 2 is an enlarged cross-sectional view showing the relation of parts ofthe invention during the passage of the thread through the threading devices; f Fig. 3 is a view similar to` that of Frg.2,

in Automaticallybut showing the thread as having passed the:

lookin the loom threading operation; and

Fig. 4 is a perspective under-side kview of one good form of threading block with which the present invention may be associated. The shuttle body l is preferably formed of Wood and has the bobbin chamber 2 in which the filling carrier or bobbin 3 on which the filling is wound, is detachably sup;l

ported, as usual in yfilling replenishingshuttles. y Y y F rontward of kthe bobbin chamber the shuttle 1s provided with aV threading block which, on the first pick of the shuttle after replenishment, assumes. control of the thread,

and on the return of the shuttle in the opposite direction the thread passes to the side delivery eye and the shuttle is completely threaded.

In the present. instance, 4the threading block 4 is provided with a longitudinally extending thread passage 5 which communi-r cates with the Side delivery eye 6, throughy which the thread is delivered during weaving. The threading block 4 may be of any` usual type andas herein shown is of the general character of thethreading block shown and described in the Stimpson Patent, No. 1,483,492, February l2, 1924, al-

though the invention, as will further appear,

is adapted for advantageous use in connection with any form of threading block.

f The threading block 4 has the thread director 7 extending frontwardly at one Side of the thread passage and theend portion 8 of the thread director projects transversely f6 for delivery therefrom during weaving.

The parts so far described may be of any desired constructionl and the threading block ma be variously contrived.

lgetween the thread director 7 Aand 'the wood of the shuttle at 1'0 there` is the usual passageway leading to the side delivery eye, the construction being such that when the shuttle is partially threadedon the first pick following replenishment, as indicated in Fig. 1, and is then returned to the replenishing side of the loom, the thread a leading from the filling carrier or bobbin in the shuttle should pass bodily through the passageway between the thread director and shuttle body to the side delivery eye, and thereafter' the present invention contemplates that it will. be prevented from passing backward in said passageway to cause partial. or complete unthreading.

In accordance with the present invention, a yielding lock is provided which normally closes `the passage leading to the side delivery eye, as shown, but which may yield to the pull of the thread as the shuttle is picked, to permit the thread to pass alongv the passageway to the side delivery eye during loom threading.

The lock, operated as hereinbefore stated, may be variously formed and contrived, but ay .good convenient construction is shown, wherein the shuttle body 1 is provided with a recess 11 at a point frontward of the side delivery eye, and in the recess 11 is mounted the lock 12 which as shown comprises a finger having a bevelled or rounded end 13 and normally under the influence of a spring to cause the upper end portion of the lock or finger to bear against a part, such as the under surface of the director of the threading block.

In the present instance of' the invention, the finger or lock 12 is seated at the lower end portion of the recess 11, as indicated at 14, 'the lower end portion of the recess being suitably formed and shaped to permit the lock or finger 12 to rock on its lower end'as a fulcruin, and the recess 11 is preferably flaring, as shown, so that the linger or lock 12 may be rocked about its lower end within the limits of the upwardly 'flaring recess.

In the present instance, the lock or finger is normally under the influence of a spring l5 serving to raise the active end of the lingeror `lock into contacting relation with the under surface of the thread director. The spring 15 as shown is of the leaf type and is secured to the lock or finger 12 as by solder or the like, but any character or construction of spring that will normally maintain theI lock in its passageway closing position would be within the contemplation of the present invention. The free end of the spring as at 16, bears against the side or wall of the flaring recess 11 and serves to impart suflicientyieldability to the lock or finger to hold it` in the passageway closing position.

The under surface of the thread director 7 is shown as provided with a recess or socket 17 into which the end portion of the finger or lock extends when the lock is in its normal position closing the passageway to the side delivery eye.

The lock or linger 12 is preferably mounted in the shuttle wood in a somewhat inclined position, as indicated, and the upper bevelled end portion 13 of the lock or linger 12, therefore, presents a suitable surface for engagement by the incoming thread during loom threadingl` such inclined surface forming between itself andthe lower surface of the thread director a guide for directing the thread to the passageway leading to the side delivery eye.

llVhe-n filling replenishment has been effected and the shuttle is picked, the end of the filling a which is secured at some llire-d point exterior to the shuttle, will trail into the longitudinal passage of the threading block, and by its swirling action will cause the threading block to take control of the thread. During this time, also, the-thread will pass below the thread director 8 into the guide formed by the lower surface of the thread director and the inclined surface 13 of the finger or lock 12. Then the shuttle is picked from the opposite side of the loom, the thread will be held by the cloth selvage, and as the shuttle passes through the shed it will ride over the inclined surface 13 of thev finger or lock and trip the lock or deflect it ont of its closing position, as indicated in Fig. 2, whereupon, the thread will pass along the passageway into the side delivery eye, while the lock or finger 12 will resume its passageway closing position to subsequently prevent the thread from passing out of the passage in the `opposite direction. In Fig. 3, the thread of Fig. 2, as indicated at a, is shown as having passed the end of the lock or linger 12 on its way to the side delivery eye, and from the fact that the end ofthe finger or lock closes the passageway after the passage of the thread, the thread is prevented from thereafter escaping from the passage-way, thus preventing unthreading of the shuttle.

What is claimed is:

1. An automatically threading loom shuttle having a side delivery eye, a threading block formed with a longitudinally extending thread passage and provided with a thread director forming a passageway for the thread leading to the side delivery eye, and a spring actuated lock between the end of the thread director and side delivery eye normally closing the passageway between the 'longitudinal thread passage and side del livery eye and yieldable to the passage of the thread during loom threading. l

2. An automatically threading loom shuttle having a side delivery eye, a threading block provided with aI thread director forming a passageway leading to the side delivery eye, a lock located at a point between the end of the thread director and side delivery eye normally .closing the passageway, and means acting yieldingly upon the lock, to maintain the passageway normally1 close'd passageway but yieldable to the passage of the thread during loom threading.

3. An automatically threading loom shuttle having a side delivery eye, a threading block provided with` a thread director forming a passageway leading to the side delivery eye, a lock in the passageway between the end of the thread Vdirector and side delivery eye normally closing the passageway and having an inclined or rounded locking end presented to the thread as it moves towards the side delivery eye during complete threading, and means acting yieldingly upon the lock to maintain the passageway normally closed but yieldable to the passage of the thread during complete threading as the thread is moved in the passageway in a direction towards the side' delivery eye. v

4. In an automatically threading' loom shuttle, the combination of a threading block having a thread director forming a for the thread to the side delivery eye, a lock between the end of the thread director and side delivery eye normally closing the passageway, and a spring normally acting to hold the lock closed an yieldable under the action of the incoming thread during complete loom threading.

5. An automatically threading loom shuttle having a side delivery eye and a passageway for the thread during loom threading, a yielding lock extending upwardly from the body of the shuttle normally closing the passage and having an inclined surface presented to the thread as it is moved towardsl the side delivery eye during loom threading to permit deliection of the lock by the thread.

6. In an automatically threading loom shuttle, the combination of the shuttle body, a threading block secured thereto and forming a passageway for the thread during loom threading that the thread may be delivered from the side delivery eye during weaving, and a yieldingly mounted lock mounted to bear upon the threading block and having an inclined surface normally closing the passageway and yielding to the pull of the thread over the inclined surface to permit its passage past the lock during loom threading and thereafter prevent unthreading.

7. In an automatically threading loom shuttle, the combination of the shuttle body, a threading block having a thread directing portion leading to the side delivery eye, and provided with a recess, a yielding lock extending into the recess of the thread director and normally closing the passage leading to the side delivery eye but yieldable under the action of the'thread during loom threading to ladmit the passage of the thread.

'8. In an automatically threading loom shuttle, thecombination of the shuttle body, a threading block forming va passageway for the thread during loom threading, and a lool: bearing against the threading block and normally closing said passageway and yieldable to the action of the thread in one direc-v tion during loomthreading and unyielding to the action of the thread in an opposite direction to thereafter prevent unthreading.

9. In an automatically threading loom shuttle, the combination of the shuttle bod f, a threading block having a longitudinal y extending thread passage for preliminary threading as the shuttle is first picked following replenishment and provided with a thread director forming a passageway leading to the side delivery eye, a lock in the passageway between the longitudinally eX- tending thread passage and side delivery eye to permit the thread to pass to the side delivery eye on thel second pick following replenishment and prevent the thread from subsequently leaving the passageway.

10. An automatically threading loom shuttle having a threading block provided with a thread director forming a passageway leading to the side delivery eye, and a yielding lock located in the passageway leading to the side delivery eye and between said eye and the end of the thread director.

In testimony whereof, I have signed my name to this speciication.

lARTHUR S. J OHNSON.` 

